S 863-012
(3)
Put the STAB TRIM SHUTOFF switches on the P10 panel to CUTOUT.
S 863-013
(4)
Remove any old grease and dirt from the ballscrew threads by wiping them with a clean, dry, non-abrasive cloth.
S 863-014
(5)
Lubricate the upper and lower stabilizer gimbals with grease (Fig. 301).
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
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757
MAINTENANCE MANUAL
(6) S 863-016Put the STAB TRIM SHUTOFF switches on the P10 panel to NORM.
(7) S 863-017Move the captain's stabilizer-trim control-wheel-switches up (airplane nose down). (a) Make sure that the stabilizer moves to its full leading edge up position.
(8) S 863-019Release the stabilizer-trim control-wheel-switches.
(9) S 863-020Put the STAB TRIM SHUTOFF switches on the P10 panel to CUTOUT.
S 213-021
(10)
Use grease on your hand to lubricate the bottom of the ballscrew between the ballnut and the endstop (Fig. 301).
S 863-028
(11)
Put the STAB TRIM SHUTOFF switches on the P10 panel to NORM.
S 863-029
(12)
Move the captain's stabilizer-trim control-wheel-switches down (airplane nose up).
(a) Make sure that the stabilizer moves to its full leading edge down position.
S 863-030
(13)
Release the stabilizer-trim control-wheel-switches.
S 863-031
(14)
Put the STAB TRIM SHUTOFF switches on the P10 panel to CUTOUT.
S 213-032
(15)
Use grease on your hand to lubricate the top of the ballscrew between the ballnut and the endstop (Fig. 301).
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A
757 MAINTENANCE MANUAL
S 863-038
(16)
Put the STAB TRIM SHUTOFF switches on the P10 panel to NORM.
S 863-023
(17)
Do the following to ensure that the ballscrew ballnut is properly lubricated:
WARNING: KEEP PERSONS AND EQUIPMENT AS FAR AWAY AS POSSIBLE FROM ALL
_______ MOVING PARTS WHILE MOVING THE STABILIZER UP OR DOWN. PERSONNEL APPLYING THE GREASE SHOULD BE IN DIRECT CONTACT WITH THE CONTROL WHEEL SWITCH OPERATOR. INJURY TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR WHEN MOVING THE STABILIZER UP OR DOWN.
(a)
Put grease into the ballscrew ballnut until grease exits the seals at the top and the bottom of the ballnut.
(b)
Use the stabilizer trim switches on the control wheel to move the stabilizer from one endstop to the other endstop.
(c)
Put grease again into the ballscrew ballnut until the grease exits the seals at the top and the bottom of the ballnut (Fig. 301).
F. Procedure - Pivot Bearing Lubrication
S 013-044
(1)
Get access to the horizontal stabilizer pivot bearing through the 311AL access door.
S 643-043
(2)
Lubricate the two zerk fittings with BMS 3-33 grease (Fig. 302).
G. Put the Airplane Back to its Usual Condition
S 863-039
(1)
Close the access door, 311AL, to the forward stabilizer-compartment (AMM 06-42-00/201).
S 043-034
(2)
Remove electrical power, if it is not necessary (AMM 24-22-00/201).
S 863-035
(3)
Remove the power from the right and center hydraulic systems (AMM 29-11-00/201).
S 863-036
(4)
Remove the DO-NOT-CLOSE tags and close these circuit breakers on the P11 panel:
(a)
11C6, CSEU 1L AC
or FLT CONT ELEC 1L AC
(b)
11C8, CSEU 2L AC
or FLT CONT ELEC 2L AC
(c)
11G17, CSEU 1R AC
or FLT CONT ELEC 1R AC
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